Contacting arrangement for shielded compartments and spaces with HF-tight shielded, movable and abutting housing components

ABSTRACT

A contacting arrangement for shielded compartments and regions with HF-tight shielded movable and abutting housing components (1, 2), particularly door sashes, door leaves, window wings and window frames, which overlap at their edge regions and which are shielded along the edge regions (1, 2) through a first contacting system (5, 6, 6), particularly through a blade contact system with a blade like projection (5) on one of the housing components (2) and contact springs (6, 6) on the other housing component (1) which engage each other in the contacting position, and additionally through a second contacting system (20) mounted in the overlapping region of the housing components (1, 2) which is displaced outward with respect to the first contacting system (5, 6, 6). An elastic absorbing material (14) is provided in the region between the two contacting systems which is attached to one of the abuttable movable housing components (1, 2). An encompassing stiffening frame (33) attached to one of the housing parts (1) serves as a carrier for the second contacting system (20) and one section of the first contacting system (5, 6, 6) and overlaps with the second housing section (2) in its edge region.

BACKGROUND OF THE INVENTION

This invention relates to a contacting arrangement for shieldedcompartments and spaces with movable and abutting housing components.More particularly, the invention relates to contacting arrangements fordoor sashes, door leaves, window wings and window frames, of the typewhich overlap at their edge regions and which engage each other at thecontact regions of the movable housing components provided, in theclosed position, through a first provided contacting system,particularly a blade contacting system with a blade like projection onone housing component and contact springs on the other housingcomponent. Additionally, shielding is provided through a secondcontacting system arrangement in the overlapping region of the housingcomponents which is displaced outward relative to the first contactingsystem and which is effective, particularly in the corner regions, inproviding continuous contact.

An example of a conventional contacting arrangement of this type isdisclosed in the European patent application no. 0095743.

In the fields of communications and high frequency technology, it is offundamental importance and often necessary to prevent the propogation ofelectric and magnetic fields in particular spatial regions in which theymay disturb or interfere with operations. It is therefore frequentlynecessary to protect individual equipment by shielding. For example,broadcast receivers or sensitive measuring equipment is protected fromelectrical disturbing influences or interference by enclosing them inshielded compartments or cages, or to equip complete spaces or regionswith shielding. Complete shielding for electrostatic fields is providedthrough thin metal foils while magnetic or magnetostatic fields areattenuated in spaces or regions using walls comprised of ferromagneticmaterials.

Since the shielding at contacting locations between stationary andmovable or between movable and abutting space shielding is lesseffective than in continuous or unbroken wall areas, these contactinglocations generally represent the least attenuated regions. Examples ofthese locations are areas between window frames and window wings,between door sashes and door leaves and/or between two window wings ordoor leaves. As a result, there is a continuing need to improve theeffectiveness of shielding associated with these contacting regions.

It is of paramount importance, especially in the high frequency bands inthe MHz and GHz regions that these contact arrangements are made asgap-free as possible in the regions of various closing corners of thehousing components. For example, one problem area is in the case ofdoors with sashes contacting the frames of the movable abutting housingcomponents and free of interference. Difficulties of contact ariseespecially in connection with two winged doors in the area of theprincipal closing corner, that is in the area of the mating cornerbetween the movable and stationary wings and the door sill and/or thedoor lintel. Gaps frequently appear here, on the order of several mm inwidth, which cannot be bridged and closed through use of most of theconventional and existing contacting arrangements. This problem istypically and commonly encountered in the use of conventional springcontacting arrangements. As a result, the effectiveness of shielding inthe high frequency region is substantially reduced. The present state ofthe art in conventional contacting arrangements is represented by thearrangement disclosed in European patent application no. 0095743.

SUMMARY OF THE INVENTION

An object of the present invention is to provide an improved contactingarrangement over the conventional type which provides better attenuatingproperties as well as shielding properties.

Another object of the present invention is to provide an improvedarrangement which also features improved construction.

The present invention takes the form of a contacting arrangement whichemploys an elastic absorbing material between the two contactingsystems. The contacting arrangement is secured to one of two abuttingshielded housing components having relative motion therebetween, andwhich, as a carrier for the second contacting system and as part of thefirst contacting system, is provided with an encompassing stiffeningframe fastened to one of the housing components which overlaps with theother housing component in the region of its edges.

As a second contacting system, strip formed continuous contactingsprings, a strip formed metal mesh or an elastic conducting strip may beprovided which extend along the inadequately high frequency-tight, orHF-tight, open gaps and are also especially placed in the cornerregions.

Through the absorbing elastic material placed between the two contactingsystems, complete additional shielding is provided which is able tocompensate for irregularities during fabrication. Finally, thestiffening frame ensures the necessary stability of the contactingelements of the individual contacting systems to each other.

BRIEF DESCRIPTION OF THE DRAWING

Features of the invention and additional objects of the invention willbe more readily appreciated and better understood by reference to thefollowing detailed description which should be considered in conjunctionwith the drawing.

FIG. 1 is a partial cut and sectional view of a double winged door witha contacting provision in accordance with the invention.

FIG. 2 is a partial sectional view illustrating further details of themovable wing in accordance with FIG. 1 with the contacting provisionaccording to the invention.

DETAILED DESCRIPTION

The double winged door in accordance with FIG. 1 is comprised of movingwing 1 and stationary wing 2, which, for example, illustrate mineralwool filled frame elements 22, 23, upper panels 11, 12 and surroundingstiffening frames 24, 33 with a rectangular cross section. Thestiffening frame 33 is elongated, with concurrent foreshortening of thestiffening frame 24 of the stationary wing 2, in the direction of thestationary wing 2. Through this means an overlap is produced in theregions of the contacting corners of both wings, which simplifies thearrangement of a second contacting system between the abutting andmoving housing components, that is not between the wings, but ratherbetween wings and the door sash.

The high-frequency (HF) tight first contacting provision for this doublewinged door includes a blade like extension 5, which, in the closedposition, projects into a channel 13 and rests by compressional forcefit against contact springs on both sides which are held in place bycontact spring supports 6, 6. These contact springs make good electricalcontact with the channel 13, are arched in the direction of theblade-like extension 5 and are, for example, pressed against the sidewalls 8 and/or 9 of the channel 13 by the hook-formed clamping elements7, 7. The side walls 8, 9 of the channel 13 and the blade-like extension5 are correspondingly formed of preformed sheet metal, the ends of whichare turned away from the contacting provision in the illustrativeembodiment and clamped and welded HF-tight between the stiffening frame24 and/or 33 and the frame element 23 and/or 22.

While in the closed position of the door, the side wall 8 of the channel13 with its clamping element 7 lies against a damping stop plate 14,attached to the sheet metal 10. In order to improve the dampingcharacteristics, the stop 14 is made of an elastic strip likeHF-absorbing material, e.g. of electrically conducting foam rubber.

The second contacting system, which is displaced outward relative to thefirst and is carried by the stiffening frame 33, may for example, be acontinuous contact spring support shoulder 20 that is attachedintermediately to the stiffening frame 33 through a profiled sheet metalpiece 15.

In FIG. 2, in which the stationary wing 2 is not shown for the sake ofclarity, it is evident that the contact spring support shoulder 20 shownin dashed lines in the closed position 20' makes complete contact andtherefore shielding possible in the corner region 21 as well.

In this illustrative embodiment of FIG. 2, it may be observed that thesecond contacting arrangement is moved against the first contactingarrangement as designated in area A. Conceivable, and indeed withoutadditional construction costs, is an encompassing arrangement of thesecond contacting system and therewith also contact in the regions ofthe adjacent closing corners of the doors. If necessary, the contactspring shoulder 20 can be replaced by a strip-formed metal mesh or anelastic conducting strip.

These contacting arrangements not only satisfy the shieldingrequirements at low and mid-frequencies, but also satisfy requirementsamply at high frequency, that is in the MHz/GHz frequency regions. Thus,for example, wide ranging gap-free contacting is ensured for theassociated elements in the region of the principal closing edges, thatis the contacting edge between the moving and stationary wings 1 and/or2 in the region of the adjacent closing edges, or the region of themating edges between the door and the door sill, and the door and thedoor lintel, and also in the corner regions of the doors. The elasticabsorbing material that is placed between the two contacting systemscompletes the shielding.

There has thus been shown and described a novel contact arrangement forshielding against electromagnetic radiation which fulfills all theobjects and advantages sought therefor. Many changes, modifications,variations and other uses and applications of the subject inventionwill, however, become apparent to those skilled in the art afterconsidering the specification and the accompanying drawings whichdisclose embodiments thereof. All such changes, modifications,variations and other uses and applications which do not depart from thespirit and scope of the invention are deemed to be covered by theinvention which is limited only by the claims which follow.

We claim:
 1. In a shielded housing enclosure for high frequency (HF)radiation having a first shielded housing component and a secondshielded housing component wherein there is relative movement betweenthe first and second shield housing components, a contacting arrangementlocated between overlapping edge regions of the shielded housingcomponents comprising a first contacting system for shielding along theedge regions of the shielded housing components, the first contactingsystem having a blade shaped projection on one of the shielded housingcomponents and contact springs on the other of the shielded housingcomponents, the blade shaped projection engaging between the contactsprings while in a contacting position, the contacting arrangementcomprising a second contacting system located to one side of the firstcontacting system and in the overlapped region of the shielded housingcomponents for providing a continuous contact including corner regions,and the contacting arrangement in the overlapped region including anelastic radiation absorbing material located in a region between the thefirst and second contacting systems and fastened to one of the twoshielded housing components, and a surrounding stiffening frame beingprovided for supporting the second contacting system and a part of thefirst contacting system that overlaps the other housing component in itsedge region.
 2. A contacting arrangement in accordance with claim 1,wherein continuous strip formed contact springs shaped as contact springsupport shoulders are provided as the second contacting system.
 3. Acontacting arrangement in accordance with claim 1, comprising a stripformed metal mesh being provided as the second contacting system.
 4. Acontacting arrangement in accordance with claim 1, comprising an elasticconductive strip being provided as the second contacting system.